Voigt, K.; Brüggemann, R.: Evaluation criteria for environmental and chemical databases (1998)
0.01
0.011159184 = product of:
0.022318369 = sum of:
0.022318369 = product of:
0.044636738 = sum of:
0.044636738 = weight(_text_:22 in 3296) [ClassicSimilarity], result of:
0.044636738 = score(doc=3296,freq=2.0), product of:
0.19228312 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05490933 = queryNorm
0.23214069 = fieldWeight in 3296, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=3296)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Online and CD-ROM review. 22(1998) no.4, S.247-262